Mean of 10 numbers is 30. Later on it was observed that numbers 15, 23 are wrongly taken as 51, 32. The correct mean is …

There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A…

The average daily income of 7 men, 11 women and 2 boys is Rs. 257.50. If the average daily income of the men is Rs. 10 m…

The average weight of 45 students in a class is 52 kg. Five of them whose average weight is 48 kg leave the class and ot…

Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, …

The difference between two angles of a triangle is 24°. The average of the same two angles is 54°. Which one of …

The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are…

The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average mon…